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Ruellia malaca.jpg Stenostephanus sp.jpg Bravaisia integerrima.jpg Ruellia mcvaughii.jpg Ruellia laslobasensis.jpg sister species Ruellia saccata and R. brevifolia.jpg Ruellia megachlamys2.jpg

Acanth Fact of the Day

A major clade within Acanthaceae is the cystolith clade. Cystoliths are anatomical structures found in leaves and are thought to be composed of calcium carbonate or calcium oxalate. Their function is unknown.
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